Safety,Tolerability, Pharmacokinetics, and Efficacy of YL211 in Patients With Advanced Solid Tumors

June 24, 2026 updated by: MediLink Therapeutics (Suzhou) Co., Ltd.

A Phase 1, Multicenter, Open-Label, First-in-Human Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Efficacy of YL211 in Patients With Advanced Solid Tumors

This is a multicenter, open-label, Phase 1 study. The study will enroll subjects with advanced solid tumors. It consists of six parts. Objectives for Dose-Escalation Parts (Part 1 and Part 4) To evaluate the safety and tolerability of YL211 as monotherapy in patients with selected advanced solid tumors (Part 1) and in combination with pembrolizumab in patients with second or third line locally advanced unresectable or metastatic non-squamous non-small cell lung cancer (NSCLC) (Part 4) To determine the maximum tolerated dose (MTD) and select the recommended expansion dose(s) (RED(s)) of YL211 as monotherapy in patients with advanced solid tumors (Part 1) and in combination with pembrolizumab in patients with second line locally advanced unresectable or metastatic non-squamous NSCLC (Part 4) Objectives for Backfill Enrollment Parts (Part 2 and Part 5) To better estimate and characterize the safety and efficacy of YL211 as monotherapy in patients with metastatic colorectal cancer (mCRC) or locally advanced unresectable or metastatic NSCLC (Part 2) and in combination with pembrolizumab in patients with previously untreated locally advanced unresectable or metastatic non-squamous NSCLC (Part 5) To select the RED(s) of YL211 as monotherapy in patients with metastatic colorectal cancer (mCRC) or locally advanced unresectable or metastatic NSCLC (Part 2) and in combination with pembrolizumab in patients with previously untreated locally advanced unresectable or metastatic non-squamous NSCLC (Part 5) Objectives for the Dose-Expansion Parts (Part 3 and Part 6) To further characterize the safety and efficacy of YL211 as monotherapy (Part 3) in patients with locally advanced unresectable or metastatic non-squamous or squamous NSCLC and in combination with pembrolizumab in patients with previously untreated locally advanced unresectable or metastatic non- squamous NSCLC (Part 6) To compare the clinical activity of YL211 in combination with pembrolizumab against pembrolizumab, pemetrexed, and platinum-based chemotherapy (cisplatin or carboplatin) in participants with previously untreated advanced unresectable or metastatic non-squamous NSCLC (Part 6)

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
500

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Australia
      • Melbourne, Australia
    • New South Wales
      • Gosford, New South Wales, Australia, 2250
        • Recruiting
        • Gosford Hospital
        • Contact:
          • site coordinator
    • Western Australia
      • Nedlands, Western Australia, Australia, 6009
        • Recruiting
        • One Clinical Research - Nedlands
        • Contact:
          • site coordinator
  • Canada
      • Ottawa, Canada
        • Recruiting
        • The Ottawa Hospital - General Campus
        • Contact:
        • Principal Investigator:
          • Scott Laurie
    • Toronto
      • Toronto, Toronto, Canada
        • Recruiting
        • Princess Margaret Hospital
        • Principal Investigator:
          • Albiruni Razak
        • Contact:
  • China
      • Chengdu, China
        • Recruiting
        • West China Hospital, Sichuan University
        • Principal Investigator:
          • Yan Zhang
        • Contact:
      • Guangzhou, China
        • Recruiting
        • Sun Yat-sen University Cancer Center
        • Principal Investigator:
          • Ruihua Xu
        • Contact:
        • Sub-Investigator:
          • Danyun Ruan
    • Beijing Municipality
      • Beijing, Beijing Municipality, China, 100029
        • Recruiting
        • China-Japan Friendship Hospital
        • Contact:
          • site coordinator
    • Zhejiang
      • Hangzhou, Zhejiang, China, 310003
        • Recruiting
        • The First Affiliated Hospital - Zhejiang University School of Medicine
        • Contact:
          • site coordinator
      • Wenzhou, Zhejiang, China, 325000
        • Recruiting
        • Wenzhou Medical University - The First Affiliated Hospital
        • Contact:
          • site coordinator
  • United States
    • Colorado
      • Aurora, Colorado, United States, 80045
        • Recruiting
        • University of Colorado Hospital - Anschutz Cancer Pavilion
        • Contact:
        • Principal Investigator:
          • Antonio Jimeno
      • Denver, Colorado, United States, 80218-1238
        • Recruiting
        • Sarah Cannon Research Institute (SCRI) at HealthONE
        • Principal Investigator:
          • Jason Henry
        • Contact:
    • Connecticut
      • North Haven, Connecticut, United States, 06473-2142
        • Recruiting
        • Yale School of Medicine - Yale Cancer Center - Smilow Cancer Hospital Care Centers - North Haven
        • Principal Investigator:
          • Michael Cecchini
        • Contact:
    • Florida
      • Orlando, Florida, United States, 32827
        • Recruiting
        • Sarah Cannon Research Institute at Florida Cancer Specialists
        • Contact:
        • Principal Investigator:
          • Cesar Perez
      • Sarasota, Florida, United States, 34232-6422
        • Recruiting
        • Florida Cancer Specialists & Research Institute (FCS) - Sarasota Cattlemen Office
        • Principal Investigator:
          • Manish Patel
        • Contact:
    • Nevada
      • Las Vegas, Nevada, United States, 89169
        • Recruiting
        • Comprehensive Cancer Centers of Nevada (CCCN) - Central Valley
        • Contact:
          • site coordinator
    • Ohio
      • Cincinnati, Ohio, United States, 45219
        • Recruiting
        • University of Cincinnati Vontz Center for Molecular Studies
        • Contact:
          • site coordinator
    • Texas
      • Houston, Texas, United States, 77030
        • Recruiting
        • The University of Texas - MD Anderson Cancer Center
        • Contact:
      • Houston, Texas, United States, 77055
        • Recruiting
        • Next Oncology - Houston
        • Contact:
          • site coordinator
      • Irving, Texas, United States, 75039
        • Recruiting
        • Next Oncology - Dallas
        • Contact:
        • Principal Investigator:
          • Shiraj Sen
      • San Antonio, Texas, United States, 78229
        • Recruiting
        • NEXT San Antonio
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Informed of the trial before the start of the trial and voluntarily sign their name and date on the ICF.
  2. Aged ≥18 years.
  3. Be able and willing to comply with protocol visits and procedures.
  4. Eastern Cooperative Oncology Group performance status (ECOG PS) of 0 or
  5. Adequate organ and bone marrow function.

For Part 1: History of an advanced solid tumors (including locally advanced unresectable or metastatic NSCLC, metastatic colorectal carcinoma (mCRC), advanced gastric adenocarcinoma (GAC)/ gastroesophageal junction adenocarcinoma (GEJA), pancreatic ductal adenocarcinoma (PDAC), hepatocellular carcinoma (HCC), intrahepatic biliary tract cancer (ih-BTC), and head and neck squamous cell carcinoma (HNSCC) who failed currently available standard therapies and are not amenable to surgical resection, or for whom no available standard therapy or no other approved therapeutic options that have demonstrated clinical benefit.

For Part 2: For patients with CRC: History of histologically or cytologically confirmed diagnosis of metastatic CRC and at least 2 prior regimens of standard treatment For patients with NSCLC: History of histologically or cytologically confirmed diagnosis of locally advanced unresectable or metastatic NSCLC and no more than 2 lines of prior cytotoxic systemic therapy in the locally advanced or metastatic setting.

For Part 3: History of histologically or cytologically confirmed diagnosis of locally advanced unresectable or metastatic non-squamous (Part 3A) or squamous (Part 3B) NSCLC and no more than 2 lines of prior systemic therapy

For Part 4: History of histologically or cytologically confirmed diagnosis of locally advanced unresectable or metastatic non-squamous NSCLC who have progressed on or after 1 or 2 prior lines of systemic therapy

For Part 5 and Part 6 Histologically or cytologically documented locally advanced unresectable or metastatic non-squamous NSCLC that is not eligible for curative surgery and/or definitive chemoradiotherapy and no prior systemic treatment for advanced unresectable or metastatic NSCLC

Exclusion Criteria:

  1. Prior treatment with an agent targeting c-MET (including antibody, ADC, chimeric antigen receptor T cell [CAR-T], and other drugs) with the exception of prior treatment with MET-targeted TKIs which are allowed.
  2. Previously received an ADC consisting of a TopoI
  3. Received continuous systemic steroids therapy for more than 28 days or require long-term (≥ 28 days) use of systemic steroids therapy within 28 days before the first administration, or have other acquired or congenital immune deficiency diseases. (Note: The protocol lists specific situational exceptions immediately following this clause).
  4. A history of leptomeningeal carcinomatosis or carcinomatous meningitis

  5. Brain metastasis, except for the following situations:

    Participants with asymptomatic brain metastasis who do not require immediate local or systemic treatment (such as mannitol or steroids, surgery, or radiotherapy) are allowed to be enrolled If the participant's brain metastasis is treated and the condition of the metastasis is stable (brain imaging examination at least 2 weeks before the first administration shows that the lesion is stable, there is no evidence of new or original brain metastasis enlargement, there are no new neurological symptoms, and immediate local or systemic treatment is not required), admission is allowed

  6. Clinically significant concomitant pulmonary disease, including but not limited to:

A history of drug-induced pneumonitis A history of (non-infectious) interstitial lung disease (ILD)/pneumonitis that requires steroids, current ILD/pneumonitis, or where suspected ILD/pneumonitis cannot be ruled out by imaging at screening

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Part 1
YL211 Monotherapy Dose Esclation
Drug: YL211
Patients will be treated with YL211 intravenous (IV) infusion only.
Experimental: Part 2
YL211 Monotherapy Backfill
Drug: YL211
Patients will be treated with YL211 intravenous (IV) infusion only.
Experimental: Part 3
YL211 Monotherapy Dose Expansion
Drug: YL211
Patients will be treated with YL211 intravenous (IV) infusion only.
Experimental: Part 4
YL211 + Pembro Combination Therapy Dose Esclation
Drug: YL211+Pembrolizumab
Patients will be treated with YL211 and Pembro by infusion.
Experimental: Part 5
YL211 + Pembro Combination Therapy Backfill
Drug: YL211+Pembrolizumab
Patients will be treated with YL211 and Pembro by infusion.
Active Comparator: Part 6
YL211 + Pembro Combination Therapy or Pembro + Chemo Combination Therapy Dose Expansion
Drug: YL211 + Pembro or Pembro+ Pemetrexed + (Carboplatin or Cisplatin)
participants will receive therapy YL211 + Pembro or Pembro+ Pemetrexed + (Carboplatin or Cisplatin) by infusion.(Part 6)

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Nature and frequency of adverse events (AEs) with severity determined according to NCI CTCAE v5.0 (Part 1 and Part 4)
Time Frame: Approximately within 36 months
AE's
Approximately within 36 months
Nature and frequency of dose-limiting toxicities (DLTs) (Part 1 and Part 4)
Time Frame: Approximately within 36 months
DLTs
Approximately within 36 months
Nature and frequency of AEs with severity, physical examination findings (including ECOG PS), vital sign measurements, standard clinical laboratory parameters, SpO2 measurements, ECG parameters, and ECHO findings (Part 2 and Part 5)
Time Frame: Approximately within 36 months
Safety
Approximately within 36 months
ORR assessed using RECIST version 1.1 (Part 2 and Part 5)
Time Frame: Approximately within 36 months
Efficacy
Approximately within 36 months
PFS using RECIST version 1.1 defined as the time interval of randomization to the date of first documentation of PD or death due to any cause, whichever occurs first (Part 3 and Part 6)
Time Frame: approximately 36 months
Efficacy
approximately 36 months
Nature and frequency of AEs with severity, physical examination findings (including ECOG PS), vital sign measurements, standard clinical laboratory parameters, SpO2 measurements, ECG parameters, and ECHO findings (Part 3 and Part 6)
Time Frame: approximately within 36 months
Safety
approximately within 36 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
physical examination findings (including Eastern Cooperative Oncology Group performance status; ECOG PS), vital sign measurements, standard clinical laboratory parameters, SpO2 measurements, ECG parameters, and ECHO findings (Part 1 and Part 4)
Time Frame: Approximately within 36 months
other safety endpoints
Approximately within 36 months
PK enpoints (Part 1 and Part 4)
Time Frame: Approximately within 36 months
Pharmacokinetic endpoints: for each participant will be estimated using standard non-compartmental methods. Descriptive statistics will be provided for all serum concentration data and PK parameter values, with a break down by dose level/cohort as appropriate. PK parameters of YL211-ADC, YL211-TAb, unconjugated payload YL0010014, metabolite YL0010034 and if applicable, other potential metabolite(s), include but not limited to area under the curve (AUC), maximum concentration (Cmax), trough concentration (Ctrough), time of maximum observed concentration (Tmax), clearance (CL), volume of distribution (Vd), and half-life time (t1/2)
Approximately within 36 months
Incidence of anti-YL211 antibody (ADA) (Part 1 and Part 4)
Time Frame: Approximately within 36 months
ADA
Approximately within 36 months
Efficacy endpoints (Part 1 and Part 4)
Time Frame: approximately 36 months
Tumor response will be evaluated using the Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. Efficacy variables include objective response rate (ORR, the sum of complete response [CR] rate and partial response [PR] rate), disease control rate (DCR, the sum of CR rate, PR rate, and stable disease [SD] rate), duration of response (DoR), duration of SD, time to response (TTR), and progression free survival (PFS), overall survival (OS), percent change in target lesion, time on therapy of the most recent prior regimen the participant received and that of YL211. The efficacy variable(s) will be also evaluated at 18 weeks after Day 1 of Cycle 1.
approximately 36 months
PK parameters of YL211-ADC, YL211-TAb, unconjugated payload YL0010014, and if applicable, potential metabolite(s), including but not limited to AUC, Cmax, Ctrough, Tmax, CL, Vd, and t1/2 (Part 2 and Part 5)
Time Frame: approximately 36 months
PK
approximately 36 months
DCR, DoR, TTR, PFS, OS, and best tumor response assessed using RECIST version 1.1 (Part 2 and Part 5)
Time Frame: approximately 36mo
approximately 36mo
Incidence of ADA (Part 2 and Part 5)
Time Frame: approximately 36mo
approximately 36mo
c-MET protein expression level in tumor tissues and its relationship with efficacy endpoints (Part 5)
Time Frame: approximately 36mo
approximately 36mo
Plasma or serum concentration of YL211-ADC, YL211-TAb, unconjugated payload YL0010014, and if applicable, potential metabolite(s), at specified time points (Part 3 and Part 6)
Time Frame: approximately 36mo
approximately 36mo
Incidence of ADA (Part 3 and Part 6)
Time Frame: approximately 36mo
approximately 36mo
ORR, DCR, DoR, TTR, OS, and best tumor response assessed using RECIST version 1.1 (Part 3 and Part 6)
Time Frame: approximately 36mo
approximately 36mo
c-MET protein expression level in tumor tissues and its relationship with efficacy endpoints (Part 3 and Part 6)
Time Frame: Approximately 36mo
Approximately 36mo

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Time Frame
Characterization of genomic alterations that are predictive of response to YL211
Time Frame: Approximately within 36 months
Approximately within 36 months
The use of circulating tumor DNA (ctDNA) to monitor response to YL211 treatment
Time Frame: Approximately within 36 months
Approximately within 36 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
MediLink Therapeutics (Suzhou) Co., Ltd.

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Hoffmann-La Roche

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 1, 2024

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 30, 2031

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 30, 2031

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 26, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 22, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 25, 2024

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 29, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 24, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • YL211-INT-101-01

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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